"1. The Target Turnover for your area is£2,000,000 per annum. After this has been reached, you will then be eligible for our Bonus Scheme. 2. For every£100,000 of invoiced and paid business on top of the£2,000,000 you will be entitled to£1,000 on top of your salary. 3. There is also an opportunity to earn a further£5,000 per annum if your Area Turnover reaches£4,000,000 . If you exceed£4,000,000 then you will carry on getting£1,000 for every£100,000 of business. If your turnover reaches£5,000,000 you will get another£5,000 bonus and again, for every£100,000 over this you will get£1,000 . 4. The first bonus will be paid six months after your Target Turnover has been reached and then six monthly thereafter. 5. In addition, there is a Bonus Scheme in place for opening new accounts. A For all new accounts opened you will get a£25 bonus when they place a repeat order. Again, this will be paid at six monthly intervals and only on orders that are invoiced and paid by the customer."
"The principles may be summarised as follows: 1. Interpretation is the ascertainment of the meaning which the document would convey to a reasonable person having all the background knowledge which would reasonably have been available to the parties in the situation in which they were at the time of the contract. 2. The background was famously referred to by Lord Wilberforce as the "matrix of fact", but this phrase is, if anything, an understated description of what the background may include. Subject to the requirement that it should have been reasonably available to the parties and to the exception to be mentioned next, it includes absolutely anything which would have affected the way in which the language of the document would have been understood by a reasonable man. 3. The law excludes from the admissible background the previous negotiations of the parties and their declarations of subjective intent. They are admissible only in an action for rectification. The law makes this distinction for reasons of practical policy and, in this respect only, legal interpretation differs from the way we would interpret utterances in ordinary life. The boundaries of this exception are in some respects unclear. But this is not the occasion on which to explore them. 4. The meaning which a document (or any other utterance) would convey to a reasonable man is not the same thing as the meaning of its words. The meaning of words is a matter of dictionaries and grammars; the meaning of the document is what the parties using those words against the relevant background would reasonably have been understood to mean. The background may not merely enable the reasonable man to choose between the possible meanings of words which are ambiguous but even (as occasionally happens in ordinary life) to conclude that the parties must, for whatever reason, have used the wrong words or syntax (see Mannai Investments Co. Ltd v Eagle Star Life Assurance Co. Ltd[1997] AC 7495 . 5. The "rule" that words should be given their "natural and ordinary meaning" reflects the common sense proposition that we do not easily accept that people have made linguistic mistakes, particularly in formal documents. On the other hand, if one would nevertheless conclude from the background that something must have gone wrong with the language, the law does not require judges to attribute to the parties an intention which they plainly could not have had. Lord Diplock made this point more vigorously when he said in The Antaios Compañía Neviera S.A. v Salen Rederierna A.B. 19851 AC 191, 201: 'If detailed semantic and syntactical analysis of words in a commercial contract is going to lead to a conclusion that flouts business commonsense, it must be made to yield to business commonsense'."
"It was our unanimous conclusion that the proper construction of the contractual terms relating to bonus was that bonus is calculated against payments received for invoices raised in the calendar year, regardless of when the payment is made."